I cannot log in in StackExchange chat.<br>
If I check the [Login help page][1] I get the following error:
> Test 5: Communication with stackauth.com – failed<br>
>  - IFRAMEs – ok<br>
>  - Referrer – ok<br>
>  - JavaScript – ok<br>
>  - Storage – ok<br>
> 
> We were not able to communicate with
> stackauth.com. Please make sure that
> you allow embedding of `<iframe>`s from
> remote sites into web pages, and that
> you allow this site and stackauth.com
> to communicate with each other.

I use Firefox 4 with [NoScript][2] and [RefControl][3] extensions, so I guess I have somehow to appropriately set referrers.

Update:
-------

I have tried to enable and disable those two extensions in combination:

 - If *RefControl* is enabled, regardless of activation status for *NoScript*, the result is as described above;
 - If *RefControl* is disabled, regardless of activation status for *NoScript*, the result for referrer check is KO;

Can anyone help? Maybe someone able to login to chat with *Firefox* 4.
Thank in advance.


  [1]: http://chat.stackexchange.com/help
  [2]: https://addons.mozilla.org/en-US/firefox/addon/noscript/
  [3]: https://addons.mozilla.org/en-US/firefox/addon/refcontrol/